tcpdump: listening on ens160, link-type EN10MB (Ethernet), capture size 262144 bytes 18:59:44.038378 IP (tos 0x0, ttl 64, id 264, offset 0, flags [none], proto UDP (17), length 425) 0.0.0.0.68 > 255.255.255.255.67: [udp sum ok] BOOTP/DHCP, Request from 52:54:00:fb:96:27, length 397, xid 0x988b5e6b, secs 4, Flags [none] (0x0000) Client-Ethernet-Address 52:54:00:fb:96:27 Vendor-rfc1048 Extensions Magic Cookie 0x63825363 DHCP-Message Option 53, length 1: Discover MSZ Option 57, length 2: 1472 ARCH Option 93, length 2: 0 NDI Option 94, length 3: 1.2.1 Vendor-Class Option 60, length 32: "PXEClient:Arch:00000:UNDI:002001" User-Class Option 77, length 4: instance#1: ERROR: invalid option Parameter-Request Option 55, length 23: Subnet-Mask, Default-Gateway, Domain-Name-Server, LOG Hostname, Domain-Name, RP, MTU Vendor-Option, Vendor-Class, TFTP, BF Option 119, Option 128, Option 129, Option 130 Option 131, Option 132, Option 133, Option 134 Option 135, Option 175, Option 203 T175 Option 175, length 45: 177.5.1.26.244.16.65.235.3.1.20.1.23.1.1.34.1.1.19.1.1.17.1.1.39.1.1.25.1.1.16.1.2.33.1.1.21.1.1.24.1.1.18.1.1 Client-ID Option 61, length 7: ether 52:54:00:fb:96:27 GUID Option 97, length 17: 0.33.208.147.46.172.7.157.66.170.47.152.60.186.7.200.43 18:59:44.038764 IP (tos 0xc0, ttl 64, id 11088, offset 0, flags [none], proto UDP (17), length 360) 141.5.200.57.67 > 255.255.255.255.68: [bad udp cksum 0x56a4 -> 0x20ac!] BOOTP/DHCP, Reply, length 332, xid 0x988b5e6b, secs 4, Flags [Broadcast] (0x8000) Server-IP 141.5.200.57 Client-Ethernet-Address 52:54:00:fb:96:27 file "undionly.kpxe" Vendor-rfc1048 Extensions Magic Cookie 0x63825363 DHCP-Message Option 53, length 1: Offer Server-ID Option 54, length 4: 141.5.200.57 Vendor-Class Option 60, length 9: "PXEClient" GUID Option 97, length 17: 0.33.208.147.46.172.7.157.66.170.47.152.60.186.7.200.43 Vendor-Option Option 43, length 50: 6.1.3.8.7.128.0.1.141.5.200.57.9.14.128.0.11.66.111.111.116.32.116.111.32.70.79.71.10.19.1.66.111.111.116.105.110.103.32.70.79.71.32.67.108.105.101.110.116.255 -- 18:59:45.041137 IP (tos 0x0, ttl 64, id 756, offset 0, flags [none], proto UDP (17), length 437) 0.0.0.0.68 > 255.255.255.255.67: [udp sum ok] BOOTP/DHCP, Request from 52:54:00:fb:96:27, length 409, xid 0x988b5e6b, secs 11, Flags [none] (0x0000) Client-Ethernet-Address 52:54:00:fb:96:27 Vendor-rfc1048 Extensions Magic Cookie 0x63825363 DHCP-Message Option 53, length 1: Request MSZ Option 57, length 2: 1472 ARCH Option 93, length 2: 0 NDI Option 94, length 3: 1.2.1 Vendor-Class Option 60, length 32: "PXEClient:Arch:00000:UNDI:002001" User-Class Option 77, length 4: instance#1: ERROR: invalid option Parameter-Request Option 55, length 23: Subnet-Mask, Default-Gateway, Domain-Name-Server, LOG Hostname, Domain-Name, RP, MTU Vendor-Option, Vendor-Class, TFTP, BF Option 119, Option 128, Option 129, Option 130 Option 131, Option 132, Option 133, Option 134 Option 135, Option 175, Option 203 T175 Option 175, length 45: 177.5.1.26.244.16.65.235.3.1.20.1.23.1.1.34.1.1.19.1.1.17.1.1.39.1.1.25.1.1.16.1.2.33.1.1.21.1.1.24.1.1.18.1.1 Client-ID Option 61, length 7: ether 52:54:00:fb:96:27 GUID Option 97, length 17: 0.33.208.147.46.172.7.157.66.170.47.152.60.186.7.200.43 Server-ID Option 54, length 4: 141.5.192.80 Requested-IP Option 50, length 4: 141.5.203.57 -- 141.5.203.57.68 > 141.5.200.57.4011: [udp sum ok] BOOTP/DHCP, Request from 52:54:00:fb:96:27, length 383, secs 4, Flags [Broadcast] (0x8000) Client-IP 141.5.203.57 Client-Ethernet-Address 52:54:00:fb:96:27 Vendor-rfc1048 Extensions Magic Cookie 0x63825363 DHCP-Message Option 53, length 1: Request MSZ Option 57, length 2: 1472 ARCH Option 93, length 2: 0 NDI Option 94, length 3: 1.2.1 Vendor-Class Option 60, length 9: "PXEClient" User-Class Option 77, length 4: instance#1: ERROR: invalid option Parameter-Request Option 55, length 23: Subnet-Mask, Default-Gateway, Domain-Name-Server, LOG Hostname, Domain-Name, RP, MTU Vendor-Option, Vendor-Class, TFTP, BF Option 119, Option 128, Option 129, Option 130 Option 131, Option 132, Option 133, Option 134 Option 135, Option 175, Option 203 T175 Option 175, length 45: 177.5.1.26.244.16.65.235.3.1.20.1.23.1.1.34.1.1.19.1.1.17.1.1.39.1.1.25.1.1.16.1.2.33.1.1.21.1.1.24.1.1.18.1.1 Client-ID Option 61, length 7: ether 52:54:00:fb:96:27 GUID Option 97, length 17: 0.33.208.147.46.172.7.157.66.170.47.152.60.186.7.200.43 Vendor-Option Option 43, length 7: 71.4.128.0.0.0.255 18:59:46.094744 IP (tos 0xc0, ttl 64, id 15011, offset 0, flags [none], proto UDP (17), length 338) 141.5.200.57.4011 > 141.5.203.57.68: [bad udp cksum 0xaecd -> 0x0ce3!] BOOTP/DHCP, Reply, length 310, secs 4, Flags [Broadcast] (0x8000) Your-IP 141.5.203.57 Server-IP 141.5.200.57 Client-Ethernet-Address 52:54:00:fb:96:27 file "undionly.kpxe" Vendor-rfc1048 Extensions Magic Cookie 0x63825363 DHCP-Message Option 53, length 1: ACK Server-ID Option 54, length 4: 141.5.200.57 Vendor-Class Option 60, length 9: "PXEClient" GUID Option 97, length 17: 0.33.208.147.46.172.7.157.66.170.47.152.60.186.7.200.43 Vendor-Option Option 43, length 28: 71.4.128.0.0.0.10.19.1.66.111.111.116.105.110.103.32.70.79.71.32.67.108.105.101.110.116.255 18:59:46.097146 IP (tos 0x0, ttl 255, id 40578, offset 0, flags [none], proto ICMP (1), length 56) 0.0.0.0 > 141.5.200.57: ICMP 141.5.203.57 udp port 68 unreachable, length 36 IP (tos 0xc0, ttl 64, id 15011, offset 0, flags [none], proto UDP (17), length 338) 141.5.200.57.4011 > 141.5.203.57.68: [|bootp] 18:59:46.121082 IP (tos 0x0, ttl 64, id 1299, offset 0, flags [none], proto UDP (17), length 71) 141.5.203.57.45212 > 141.5.200.57.69: [udp sum ok] 43 RRQ "undionly.kpxe" octet blksize 1432 tsize 0 18:59:46.124909 IP (tos 0x0, ttl 64, id 15012, offset 0, flags [none], proto UDP (17), length 55) 141.5.200.57.52802 > 141.5.203.57.45212: [bad udp cksum 0xadb2 -> 0x7797!] UDP, length 27 18:59:46.125332 IP (tos 0x0, ttl 64, id 1556, offset 0, flags [none], proto UDP (17), length 32) 141.5.203.57.45212 > 141.5.200.57.52802: [udp sum ok] UDP, length 4 18:59:46.125459 IP (tos 0x0, ttl 64, id 15013, offset 0, flags [none], proto UDP (17), length 1464) 141.5.200.57.52802 > 141.5.203.57.45212: [bad udp cksum 0xb333 -> 0x3f36!] UDP, length 1436 18:59:46.125832 IP (tos 0x0, ttl 64, id 1813, offset 0, flags [none], proto UDP (17), length 32) 141.5.203.57.45212 > 141.5.200.57.52802: [udp sum ok] UDP, length 4 18:59:46.125923 IP (tos 0x0, ttl 64, id 15014, offset 0, flags [none], proto UDP (17), length 1464) 141.5.200.57.52802 > 141.5.203.57.45212: [bad udp cksum 0xb333 -> 0x4f0a!] UDP, length 1436 18:59:46.126205 IP (tos 0x0, ttl 64, id 2070, offset 0, flags [none], proto UDP (17), length 32) -- 18:59:46.805757 IP (tos 0x0, ttl 64, id 292, offset 0, flags [none], proto UDP (17), length 414) 0.0.0.0.68 > 255.255.255.255.67: [udp sum ok] BOOTP/DHCP, Request from 52:54:00:fb:96:27, length 386, xid 0xbd1b482a, secs 4, Flags [Broadcast] (0x8000) Client-Ethernet-Address 52:54:00:fb:96:27 Vendor-rfc1048 Extensions Magic Cookie 0x63825363 DHCP-Message Option 53, length 1: Discover MSZ Option 57, length 2: 1472 ARCH Option 93, length 2: 0 NDI Option 94, length 3: 1.2.1 Vendor-Class Option 60, length 9: "PXEClient" User-Class Option 77, length 4: instance#1: ERROR: invalid option Parameter-Request Option 55, length 23: Subnet-Mask, Default-Gateway, Domain-Name-Server, LOG Hostname, Domain-Name, RP, MTU Vendor-Option, Vendor-Class, TFTP, BF Option 119, Option 128, Option 129, Option 130 Option 131, Option 132, Option 133, Option 134 Option 135, Option 175, Option 203 T175 Option 175, length 57: 177.5.1.26.244.16.65.235.3.1.20.1.23.1.1.34.1.1.22.1.1.19.1.1.20.1.1.17.1.1.39.1.1.25.1.1.41.1.1.16.1.2.33.1.1.21.1.1.24.1.1.38.1.1.18.1.1 Client-ID Option 61, length 7: ether 52:54:00:fb:96:27 GUID Option 97, length 17: 0.33.208.147.46.172.7.157.66.170.47.152.60.186.7.200.43 18:59:46.806416 IP (tos 0xc0, ttl 64, id 11564, offset 0, flags [none], proto UDP (17), length 360) 141.5.200.57.67 > 255.255.255.255.68: [bad udp cksum 0x56a4 -> 0x125d!] BOOTP/DHCP, Reply, length 332, xid 0xbd1b482a, secs 4, Flags [Broadcast] (0x8000) Server-IP 141.5.200.57 Client-Ethernet-Address 52:54:00:fb:96:27 file "undionly.kpxe" Vendor-rfc1048 Extensions Magic Cookie 0x63825363 DHCP-Message Option 53, length 1: Offer Server-ID Option 54, length 4: 141.5.200.57 Vendor-Class Option 60, length 9: "PXEClient" GUID Option 97, length 17: 0.33.208.147.46.172.7.157.66.170.47.152.60.186.7.200.43 Vendor-Option Option 43, length 50: 6.1.3.8.7.128.0.1.141.5.200.57.9.14.128.0.11.66.111.111.116.32.116.111.32.70.79.71.10.19.1.66.111.111.116.105.110.103.32.70.79.71.32.67.108.105.101.110.116.255 18:59:46.807098 IP (tos 0x10, ttl 128, id 0, offset 0, flags [none], proto UDP (17), length 389) 141.5.192.80.67 > 255.255.255.255.68: [udp sum ok] BOOTP/DHCP, Reply, length 361, xid 0xbd1b482a, secs 4, Flags [Broadcast] (0x8000) Your-IP 141.5.203.57 Client-Ethernet-Address 52:54:00:fb:96:27 Vendor-rfc1048 Extensions Magic Cookie 0x63825363 DHCP-Message Option 53, length 1: Offer Server-ID Option 54, length 4: 141.5.192.80 Lease-Time Option 51, length 4: 594230 Subnet-Mask Option 1, length 4: 255.255.240.0 Default-Gateway Option 3, length 4: 141.5.192.254 Domain-Name-Server Option 6, length 4: 141.5.192.80 Domain-Name Option 15, length 26: "client.mpi-dortmund.mpg.de" T119 Option 119, length 57: 12.109.112.105.45.100.111.114.116.109.117.110.100.3.109.112.103.2.100.101.0.6.99.108.105.101.110.116.192.0.7.115.116.111.114.97.103.101.192.0.14.98.97.99.107.117.112.45.115.116.111.114.97.103.101.192.0 18:59:46.807282 IP (tos 0x0, ttl 64, id 599, offset 0, flags [none], proto UDP (17), length 426) 0.0.0.0.68 > 255.255.255.255.67: [udp sum ok] BOOTP/DHCP, Request from 52:54:00:fb:96:27, length 398, xid 0xbd1b482a, secs 11, Flags [Broadcast] (0x8000) Client-Ethernet-Address 52:54:00:fb:96:27 Vendor-rfc1048 Extensions Magic Cookie 0x63825363 DHCP-Message Option 53, length 1: Request MSZ Option 57, length 2: 1472 ARCH Option 93, length 2: 0 NDI Option 94, length 3: 1.2.1 Vendor-Class Option 60, length 9: "PXEClient" User-Class Option 77, length 4: instance#1: ERROR: invalid option Parameter-Request Option 55, length 23: Subnet-Mask, Default-Gateway, Domain-Name-Server, LOG Hostname, Domain-Name, RP, MTU Vendor-Option, Vendor-Class, TFTP, BF Option 119, Option 128, Option 129, Option 130 Option 131, Option 132, Option 133, Option 134 Option 135, Option 175, Option 203 T175 Option 175, length 57: 177.5.1.26.244.16.65.235.3.1.20.1.23.1.1.34.1.1.22.1.1.19.1.1.20.1.1.17.1.1.39.1.1.25.1.1.41.1.1.16.1.2.33.1.1.21.1.1.24.1.1.38.1.1.18.1.1 Client-ID Option 61, length 7: ether 52:54:00:fb:96:27 GUID Option 97, length 17: 0.33.208.147.46.172.7.157.66.170.47.152.60.186.7.200.43 Server-ID Option 54, length 4: 141.5.192.80 Requested-IP Option 50, length 4: 141.5.203.57 18:59:46.808336 IP (tos 0x10, ttl 128, id 0, offset 0, flags [none], proto UDP (17), length 389) 141.5.192.80.67 > 255.255.255.255.68: [udp sum ok] BOOTP/DHCP, Reply, length 361, xid 0xbd1b482a, secs 11, Flags [Broadcast] (0x8000) Your-IP 141.5.203.57 Client-Ethernet-Address 52:54:00:fb:96:27 Vendor-rfc1048 Extensions Magic Cookie 0x63825363 DHCP-Message Option 53, length 1: ACK Server-ID Option 54, length 4: 141.5.192.80 Lease-Time Option 51, length 4: 594230 Subnet-Mask Option 1, length 4: 255.255.240.0 Default-Gateway Option 3, length 4: 141.5.192.254 Domain-Name-Server Option 6, length 4: 141.5.192.80 Domain-Name Option 15, length 26: "client.mpi-dortmund.mpg.de" T119 Option 119, length 57: 12.109.112.105.45.100.111.114.116.109.117.110.100.3.109.112.103.2.100.101.0.6.99.108.105.101.110.116.192.0.7.115.116.111.114.97.103.101.192.0.14.98.97.99.107.117.112.45.115.116.111.114.97.103.101.192.0 18:59:46.888730 IP (tos 0x0, ttl 64, id 861, offset 0, flags [none], proto UDP (17), length 70) 141.5.203.57.50187 > 141.5.200.57.69: [udp sum ok] 42 RRQ "default.ipxe" octet blksize 1432 tsize 0 18:59:46.892085 IP (tos 0x0, ttl 64, id 15262, offset 0, flags [none], proto UDP (17), length 53) 141.5.200.57.56742 > 141.5.203.57.50187: [bad udp cksum 0xadb0 -> 0x8c06!] UDP, length 25 18:59:46.892620 IP (tos 0x0, ttl 64, id 1121, offset 0, flags [none], proto UDP (17), length 32) 141.5.203.57.50187 > 141.5.200.57.56742: [udp sum ok] UDP, length 4